US4851729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor
Assignee: Johnson Electric SA
•
Filing: 1988-06-07
•
Granted: 1989-07-25
•
Expires: 2008-06-07
Abstract
Abstract The motor has a plastic holding member which is a sliding fit in a casing of the motor and which supports at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another.
Inventors
- 👤 Roger F. Baines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:53
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/145
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
An electric motor comprising a casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, the holding member having arcuately extending windows in which the respective segment magnets are supported and a resilient portion at one end of each window for accommodating longitudinal tolerance of the segment magnets, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 2
Dependent Claim
132 words
An electric motor comprising a casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, the holding member having arcuately extending windows in which the respective segment magnets are supported and a resilient portion at one end of each window for accommodating longitudinal tolerance of the segment magnets, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 3
Dependent Claim
28 words
The motor of claim 1, wherein the plastics holding member is of generally tubular shape, the holding member being a sliding fit inside the casing of the motor.
Claim 4
Dependent Claim
31 words
The motor of claim 2, wherein resilient portions are provided at the longitudinally extending edges of the windows to urge the segment magnets radially outwards against the casing of the motor.
Claim 5
Dependent Claim
24 words
The motor of claim 2, wherein the plastics holding member has brush gear supporting formations at the end thereof adjacent to the end cap.
Claim 6
Dependent Claim
19 words
The motor of claim 4, wherein each formation includes a pillar projecting from one end of the holding member.
Claim 7
Dependent Claim
26 words
The motor of claim 1, wherein the plastics holding member and the casing have interengaging means for angularly positioning the holding member relative to the casing.
Claim 8
Dependent Claim
27 words
The motor of claim 1, wherein the plastics holding member and end cap have interengaging means for angularly positioning the end cap relative to the holding member.
Claim 9
Dependent Claim
23 words
The motor of claim 1, wherein the end cap is of metal and wherein a motor bearing is supported by the end cap.
Claim 10
Dependent Claim
104 words
A fractional horsepower permanent magnet direct current motor comprising a casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 11
Dependent Claim
104 words
A fractional horsepower permanent magnet direct current motor comprising a casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 12
Dependent Claim
20 words
The motor of claim 9 having an overall length of substantially 30 mm and a width of substantially 16 mm.
Claim 13
Dependent Claim
139 words
An electric motor comprising a can-like casing closed at one end, a first bearing supported by the closed end of the casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap supporting a second bearing, the end cap closing the other end of the casing, the plastics holding member extending between said one end of the casing and the end cap and supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 14
Dependent Claim
139 words
An electric motor comprising a can-like casing closed at one end, a first bearing supported by the closed end of the casing, a plastics holding member mounted in the casing, an armature, having a commutator, mounted within the plastics holding member, and an end cap supporting a second bearing, the end cap closing the other end of the casing, the plastics holding member extending between said one end of the casing and the end cap and supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member having locating means extending in a direction parallel to the axis of the motor said locating means positioning the brush gear on the holding member.
Claim 15
Dependent Claim
20 words
The motor of claim 10 having an overall length of substantially 30 mm and a width of substantially 16 mm.
Claim 16
Dependent Claim
98 words
An electric motor comprising a casing, a plastics holding member mounted in the casing, an armature having a commutator mounted within the plastics holding member, and a end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member including a housing positioning each brush leaf on the holding member, each housing being open at one end and including an axially extending slot.
Claim 17
Dependent Claim
98 words
An electric motor comprising a casing, a plastics holding member mounted in the casing, an armature having a commutator mounted within the plastics holding member, and a end cap closing the casing, the plastics holding member supporting at least one pair of segment magnets and brush gear for the motor in a fixed angular position relative to one another, and the brush gear comprising brush leaves supported by respective motor terminals, the holding member including a housing positioning each brush leaf on the holding member, each housing being open at one end and including an axially extending slot.
References Cited (Backward Citations)
US3095515A
Cited
GB1014163A
Cited
US3444402A
Cited
US3521096A
Cited
GB1251574A
Cited
US3760209A
Cited
US3831048A
Cited
GB1463778A
Cited
US4071794A
Cited
FR2432790A1
Cited
US4414481A
Cited
US4623810A
Cited
DE3426996A1
Cited
JPS61196747A
Cited
US4677330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |